I'm interested in buying a single-knob Champ, but with each of the two inputs giving a different sound (tweed/blackface). Is that possible, and is anyone making anything like it? I generally prefer blackface tones, but would like tweed as well. It sounds like the blackface Champ is identical to the tweed version, but merely inserts a blackface tone stack up front. It seems like it should be relatively easy to make on Champ that does both.